John heuky thomas



J. H. THOMAS. BOGIE FOR RAILWAY AND TRAMWAY VEHICLES. APPLICATION menocr. 21. I918.

- 1 07,326. Patented June 17, 1919.

2 SHEETS-SHEET I :Iu 1;, rant-.112:

INVEN TOR John Henry Thomas A T TOHNE Y5 J. H. .THOMAS.

BOGIE FOR RAILWAY AND TRAMWAY VEHICLES. APPLICATION FILED OCT. 21, 1918.

1,30%326. Patented June 17, 1919.

2 SHEETS-SHEET 2.

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1N mv TOR John Henry Thomas ATTURNE Y5 A TFE.

JOHN HENRY THOMAS, 0F MEDINDIE, SOUTH AUSTRALIA, AUSTRALIA.

BOGIE FOR RAILWAY AND TRAMWAY VEHICLES.

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Application filed October 21, 1918.

To all whom it may concern:

Be it known that I, J OHN HENRY THOMAS, a subject of the King of GreatBritain and Ireland, residing at No. 30 Hawkers road, Medindie, State ofSouth Australia, Gommonwealth of Australia, have invented certain newand useful Improvements in Bogies for Railway and Tramway Vehicles, ofwhich the following is a specification.

It is well known that with these bogies as heretofore constructed andconnected to the body main frame whether of a lllf'EtIIllCilI',

railway carriage or truck or of a locomotive, that is with a king pin atthe center or near the center of a rigid or one piece bogie frame, thereis excessive wear of the rails and of the wheel flanges when the bogieis passing around any curve. This is due to the fact that the two axlesare maintained at all times in position parallel one to the other andcannot take positions truly radial to the curve, and consequently thewheel flanges cannot take positions truly tangential to the rails, buttend to ride upon the rails to their mutual destruction.

According to my invention the frame of "the bogie is made in two partseach carrying ward from the link and passes through eyes in the twoparts of the bogie and serves as the said king pin and the other pinprojects upward and passes through a hole in the center ofthe somewhat Vshaped beam into a hole in the center of a beam rigidly secured to theframe of the vehicle body. The two pins on the somewhat V shaped beamproject downwardlytherefrom one at each end and engage slidable blocksslidable upon inclined horn plates secured upon the opposing faces ofthe two parts of the bogie frame and governing the before mentionedrelative movement of the same.

The sidewise movement of the bogie relatively to the vehicle frame asthe bogie enters a curve carries it over relatively to the frame of thevehicle body and therefore relatively to the somewhat V shaped beam, thetwo depending governor pins and the slid- Specification of LettersPatent.

Patented June 17, 919.

Serial No. 258,982.

able blocks so that when passing around a curve of any radius the twoparts of the bogie are moved automatically into such position that thetwo axles take up positions truly radial tothe rails and consequentlythe wheel flanges take up positions truly tangential thereto.

The weight of the tramcar or vehicle is supported by the bogie by meansof bearing blocks fastened to the underside of the car body frame andslidable upon bed plates upon the bogie, the frame of the bogie beingsupported by springs suspended between the frame of the bogie and theaxle boxes.

In order that my invention may be clearly understood I will describe thesame with reference to the accompanying drawings in which only theessential features are shown, details of the design and fasteningtogether of the several parts being left to be filled in according tothe make ofcar or vehicle to which the invention is to be applied.

Figure 1 is a plan view partly in sect-ion, showing a bogie constructedaccording to my invention as running upon a length of straight track,and Fig. 2 is a similar view, but with no section, showing the bogie asrunning upon a length of curved track. The sectional portion of Fig. 1shows the top flanges of one of the H beams removed to more clearly showthe inclined horn plates 1%. In these two figures I have shown andshaded with vertical lines the bearing blocks 28 secured to the frame ofthe car body. I have also indicated by dotted lines the position of theside beams of the vehicle body frame and by an arrow the direction ofmovement of the vehicle.

Fig. 3 is a side view, partly in section, showing the bogie as in Fig. 1together with portion of the frame of the car body but with the nearside channel iron of that frame removed, and showing the bearing blocks"28 in section; the sectional part being upon the line a Z) of Fig. 1 toshow more clearly the kin in 5 and connections for o aerating the a ping the car body frame to the bogie, and the side springs, but the fronthalf of the bogie is removed to show said connection more closely.

According to my invention the frame of the bogie is made in two parts,front and rear, each part having at one end an axle with a pair ofwheels, and at the other end an eye, the eyes of the two parts beingmarked 3 and 4 respectively, in which eyes is fitted a king pin 5whereby the two parts are held together and about which they may make arelative swinging movement in a horizontal plane. The eyes 3 and a areformed preferably by steel castings fitting one another concentricallyand bolted or riveted to the H beams of the bogie frame.

At each side of the king pin 5 are formed two opposing inclined faces,that is to say the rear face 8 of the forward part of the bogie and theforward face 9 of the rear part of the bogie at each side of the kingpin are specially shaped or inclined in a horizontal plane being widestapart at the end next to the king pin and closer together at the outerend, and between them they carry slidable blocks 10 arranged in pairs,each pair of blocks forming between them a socket for one of thegovernor pins 12 which project from the somewhat V shaped beam 11 andbeing so proportioned and inclined that when the bogie is running upon astraight length of track the governor pins 12 with the blocks 10 are atabout the center of the inclined faces 8 and 9. The slidable blocks 10must be made in parts or pairs so that they may adjust themselves uponthe governor pins 12 as they cause the angle between the opposing faces8 and 9 to vary. This it does however to a very slight extent only.

Preferably the frame of each half of the bogie is constructed of twoflanged end plates 1, 1 of cast steel connected together by four beams2, 2 of H or of channel section, two below and two above, and thebefore-mentioned opposing faces are formed by means of blocks 1% eitherof cast or wrought metal forming as it were horn plates which aresecurely fastened to the lower of such beams as indicated moreparticularly in Figs. 1 and 4.

The link 16 with two oppositely projecting pins is positioned so thatthe pin 5 upon its one end projects downward and serves as the king pinto hold together the two parts of the bogie while the pin 17 upon itsfront end projects upward and serves as a coupling pin which passesthrough the somewhat V shaped beam 11 and into a hole in a beam 19secured to the main frame 18 of the vehicle body and so couples thebogie to the main frame, and in the case of a tramcar driven by motorson the bogie carries the body forward with the bogie or in the casetioned slidable governor blocks 10 and each of which has a collar andpin below the slidable block.

The amount of incline upon the faces 8 and 9 of the horn plates 14: in atramcar or railway vehicle other than a locomotive depends upon thedistance the rear corner of the rear part of the bogie is behind theupwardly projecting pin 17 of the link 16, that is behind the point ofattachment of the bogie to the main frame.

In the case of an electric tramcar in which one or both of the axles isfitted with an electric motor, should more strength be re quired toassist the king pin 5 to cause the motors 0n the bogie to push the car,a light turntable may be placed on the pivot point 30 of the rear halfof the bogie with concentric rings or other suitable connection.

To assist in returning the two parts of the bogie to central or normalposition after displacement in rounding a curve and to assist inmaintaining them in central position when running on the straight Iprovide upon each side a strong spring 20 carried by and projecting froma bracket 21 secured to the side beam of the frame 18 of the vehiclebody and adapted to engage by means of a flanged head the slidableblocks 10 of the bogie. These springs 20 are so controlled by a centralbolt 23 that when the blocks 10 are in their central or normal positiontheir heads just touch but do not exert any further pressure upon theblocks. hen rounding a curve the spring upon the outside of the curve iscompressed by the outward movement of the corresponding slidable blockbut the spring upon the inside cannot follow its block. The result isthat the full power of the outside spring is available to assist inreturning the outside block to normal position.

The weight of the vehicle is supported by the bogie by means of flangedbed plates 25 secured to the top of the bogie frame and by bearingblocks 28 secured to the underside of the frame of the car body. Thebearing blocks 28 have curved outer ends, and the flanges 26 of the bedplates 25 are curved also but to a slightly greater radius. Between thecurved outer ends of the blocks 28 and the flanges 26 of the plates uponthe rear part of the bogie provision is made for a slight freedom orsidewise movement, but between the ends of the blocks 28 and the flanges26 of the plates upon the front-part of the bogie provision is'made forconsiderable movement, sufficient to permit the bogie to move oversidewise when rounding the sharpest curve on the track before the blockcontacts with the flange.

' The bogies are always placed beneath the vehicle body with the beam 11toward the end of the car so that when the bogie is at the front of thecar the beam is toward the front and when at the rear it is toward therear, and the several parts operate correctly when passing around acurve whether the bogie is at the leading or the trailing end of thecar, so that the reversing of the direction of the car makes nodifference to its operation.

I will now describe the movement of a bogie constructed and attached asabove described.

\Vhen running upon a straight road the governor pins 12 are maintainedin position at an equal distance from the center of the bogie, and thetwo axles are parallel to one another as shown more particularly inFig. 1. I

hen the vehicle enters a curve however the front wheels and axle of thebogie move over with the curve while the front of the body frame of thevehicle carrying with it the governor pins 12 is held by the blocks 28and the flanges 26 of the beds 25 over toward the outside of the curve.So soon as this movement commences the block 28 of the main frame comesagainst the flange 26 of the rear bed plate 25 of the bogiewhich thenacts as a fulcrum, and the connection to the main frame through theupwardly projecting pin 17 of the link 16 carries the V shaped beam 11and consequently the two governor pins 12 toward the outer side of thecurve. This sidewise movement of the pins 12 through the blocks 10operates upon the opposing inclined faces 8 and 9 of the frame of thebogie and causes the two parts of such frame to swing somewhat about theking pin 5, the inclined faces of the horn plates upon the outer side ofthe curve being forced farther apart and those toward the inner sidemoving closer together. This movement of the two parts of the bogiethrows the two axles more or less out of parallel according to theradius of the curve and causes each to take up a position radial to thecurve, and the flanges of the wheels to take up positions tangential tothe rails so that they move around them freely without destructive wear.

I have shown and described a practical application of my invention, butsince there are numerous types of bogie vehicles to which it isapplicable it will be evident that to apply it to such vehicles manymodifications will be required which however will present no difficultyto a competent workman. In particular for a locomotive consideration ofthe size and position of the cylinders, the width of ga e and frame, andthe height of the frame wi l render SUbSiZZLU' tial modificationsnecessary.

What I claim as my invention is- 1. A bogie for a railway or tramwayvehicle made in two parts, each part carrying one of the axles and thetwo parts being held together by a vertical king pin passing through aneye in each of the two parts, such king pin being on one end of a linkwhich has onits other end a second vertical pin that engages a beamrigidly secured to the frame of the vehicle body and holds there to asomewhat V-shaped beam upon the ends of which are two governor pins thatengage and operate slidable governor blocks positioned and slidablebetween the opposed inclined faces of horn plates secured to the twoparts of the bogie.

2. In a bogie for a railway or tramway vehicle made in two parts eachpart having at one end an axle with a pair of wheels and at the otherend an eye which takes the king pin whereby the two parts are heldtogether; two slidable blocks one on each side of the king pinpositioned between oppositely inclined faces or horn plates withconnections to the vehicle body so that as the vehicle passes on to acurve the blocks are moved to one side or the other and alter thedistance between the oppositely inclined faces or horn plates and socause the two parts of the bogie to swing somewhat about the king pinthrowing the two axles more or less out of parallel according to theradius of the curve and causing them to take positlons radial to thecurve.

3. In a bogie for a railway or tramway vehicle made in two parts eachpart having at one end an axle with a pair of wheels and at the otherend an eye and having upon each side of the eye an inclined horn plate;a link having at its one end a downwardly projecting pin passing throughthe said eyes and holding the two parts together and having at its otherend an upwardly projecting pin engaging a beam secured to the frame ofthe vehicle body; and a somewhat V-shaped beam mounted at its centerupon the said upwardly projecting pin and having at each end adownwardly projecting pin engaging and operating slidable blocksslidable upon said inclined horn plates.

4. In a bogie for a railway or tramway vehicle made in two parts eachpart having at one end an axle with a pair of wheels and at the otherendan eye and having upon each side of the eye an inclined horn plate; alink having at its one end a downwardly projecting pin passing throughthe said eyes and holding the two parts of the bogie together and havingat its other end an up- D wardly projecting pin engaging a beam securedto the frame of the vehicle body; a somewhat V-shaped beam mounted atits center upon the said upwardly projecting pin and having at each enda pin engaging and.

5. In a bogie for a railway ortramw ayv vehicle made in two parts eachpart having at one end an axle with a pair of wheels and at the otherend an eye andhaving upon each side of the eye an inclined horn plate; alink having at its one end a down: wardly projecting pin passing throughthe said eyes and holding the two parts of the bogie together and havingat its other end an upwardly projecting pin engaging a beam secured tothe frame of the vehicle body; a somewhat V-shaped beam mounted at itscenter upon the said upwardly projecting pin and having at each end apin engaging and operating slidable blocks slid.- able uponsaid inclinedhorn plates; and springs carried by and projecting from brackets securedto the frame of the'vehicle body adapted to engage the said slidableblocks when in normal position or when pushed outward but not whenpushed inward.

6. In a bogie for a railway or tramway vehicle made in two parts eachpart having at one end an axle with a pair of wheels and at the otherend an eye and having upon eaehsidv f the eye an inclined horn plate; alink having at its one end a downwardly projecting pin passing throughthe said eyes and holding the two parts of the bogie to gether andhaving at its other end an upwardly projecting pin engaging a beamsecured to the frame of the vehicle body; a somewhatV-shaped beammounted at its center upon the said upwardly projecting pin and havingat each end a pin engaging and operating slidable blocks made in twoparts and slidable upon said inclined horn plates; springs carried byand projecting from brackets secured to the frame of the e e body aapted o eng g he s id slidable blocks when in normal position or whenpushed Outward, but not when pushed inward; and bearer blocks securedupon the underside of the frame of the vehicle body resting and slidableupon flanged bed plates secured upon the tops of the two parts of thebogie.

In testimony that I claim the foregoing as my invention I have signed myname in the presence of two subscribing witnesses this nineteenth day ofSeptember, 1918.

JOHN HENRY THOMAS.

Witnesses:

ARTHUR Gone Oo rso KATHL MARI CoLmsoN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

